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<p>Mulberry is widely cultivated for its foliage, which serves as the sole diet for domesticated silkworms. Predominantly raised under rainfed conditions, the crop is prone to frequent drought episodes that affect its productivity. The present work investigates the mechanisms by which the trees respond to water deficit. Drought stress was imposed to mulberry plants using the gravimetry method. The study identified over 830 genes which are differentially expressed (404 up-regulated; 429 down-regulated) in mulberry under water-limiting conditions. Mapping of these genes against the KEGG pathway database indicated that mulberry responds to drought stress by ensuring a metabolic adjustment leading to energy conservation under water-limiting conditions. The information generated from the findings of the study throws insights into the specific drought adaptive responses in a mulberry genotype with drought tolerance traits. The leads would be useful in devising strategies for improving drought tolerance in mulberry.</p>

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Transcriptomic study reveals metabolic rearrangement and energy conservation under drought stress in mulberry

  • 期刊论文

  • 发表日期：

    2025年4月1日

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  • K. H. Dhanyalakshmi,
  • Shivasharanappa S. Patil,
  • H. V. Chaitra,
  • Pooja Bidari,
  • Karaba N. Nataraja

摘要

Mulberry is widely cultivated for its foliage, which serves as the sole diet for domesticated silkworms. Predominantly raised under rainfed conditions, the crop is prone to frequent drought episodes that affect its productivity. The present work investigates the mechanisms by which the trees respond to water deficit. Drought stress was imposed to mulberry plants using the gravimetry method. The study identified over 830 genes which are differentially expressed (404 up-regulated; 429 down-regulated) in mulberry under water-limiting conditions. Mapping of these genes against the KEGG pathway database indicated that mulberry responds to drought stress by ensuring a metabolic adjustment leading to energy conservation under water-limiting conditions. The information generated from the findings of the study throws insights into the specific drought adaptive responses in a mulberry genotype with drought tolerance traits. The leads would be useful in devising strategies for improving drought tolerance in mulberry.